Englishfor English speakers
operator
Noun
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An operator is a person who operates something.
Jo is the operator of the tractor.
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An operator is a person who works on making connections for people over the telephone.
The operator was struggling to keep the line connected.
category
Noun
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A category is a group of people or things that are the same in some way.
The music business tries to put music into various categories, such as rock, pop, jazz, etc.